The Current Electricity and Experimental Physics 1 category gathers questions that focus on the basics of electric current, circuits, and experimental methods in physics. It helps students reinforce core concepts and apply them to problem‑solving scenarios. Ideal for revision before board or entrance exams.
Junction law: ΣI=0 charge conservation; loop law: ΣV=0 energy conservation.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Rt=R0(1+αt), interpolate to find temperature from resistance.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Resistivity depends on material nature and temperature, not dimensions.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
1 unit =1 kWh =3.6×10^6 J, household commercial unit.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Three equal R parallel: Req=R/3, total less than individual.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
R=V^2/P=220^2/10=4840 Ω per power formula.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Blue 6, Grey 8, Orange 10^3, Silver 10%: 68kΩ ±10% = 68,000Ω.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Parallel internal: 1/req=Σ1/ri=5/1.5 => req=0.3 Ω.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Parallel cells increase current capacity, same voltage, reduce internal resistance.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Series Req=ΣR, Parallel 1/Req=Σ1/R, reduce stepwise.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Ideal cell internal resistance zero, maintains constant emf.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
Current is scalar, not vector, though direction considered for conventional flow.
Ref: NCERT Physics Class 12 Chapter 3 Current Electricity
